/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kaaproject.kaa.server.admin.services.auth;

import org.kaaproject.kaa.common.dto.KaaAuthorityDto;
import org.kaaproject.kaa.common.dto.UserDto;
import org.kaaproject.kaa.server.admin.services.dao.UserFacade;
import org.kaaproject.kaa.server.admin.services.entity.AuthUserDto;
import org.kaaproject.kaa.server.admin.services.entity.User;
import org.kaaproject.kaa.server.control.service.ControlService;
import org.kaaproject.kaa.server.control.service.exception.ControlServiceException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

@Service("userDetailsService")
public class UserDetailsServiceImpl implements UserDetailsService {

  @Autowired
  private UserFacade userFacade;

  @Autowired
  private ControlService controlService;

  @Override
  public UserDetails loadUserByUsername(String username)
      throws UsernameNotFoundException {
    User user = userFacade.findByUserName(username);
    if (user == null) {
      throw new UsernameNotFoundException("user not found");
    }
    AuthUserDto authUser = new AuthUserDto(user);
    if (authUser.getAuthority() != KaaAuthorityDto.KAA_ADMIN) {
      UserDto userDto;
      try {
        userDto = controlService.getUserByExternalUid(authUser.getExternalUid());
        authUser.setId(userDto.getId());
        authUser.setTenantId(userDto.getTenantId());
      } catch (ControlServiceException ex) {
        throw new UsernameNotFoundException("unable to fetch user details", ex);
      }
    }
    return authUser;
  }

}
